From 3c47b24d28f5231d2cba5fa4fbe8a0a5c1ada422 Mon Sep 17 00:00:00 2001
From: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
Date: Mon, 7 Jul 2025 14:21:37 +0200
Subject: [PATCH] Backport PR #30186: Fix figure legend when drawing stackplots
---
lib/matplotlib/legend_handler.py | 1 -
lib/matplotlib/tests/test_axes.py | 14 ++++++++++++++
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/lib/matplotlib/legend_handler.py b/lib/matplotlib/legend_handler.py
index 97076ad09cb8..f7c9c4196229 100644
--- a/lib/matplotlib/legend_handler.py
+++ b/lib/matplotlib/legend_handler.py
@@ -800,7 +800,6 @@ def get_first(prop_array):
legend_handle.set_linewidth(get_first(orig_handle.get_linewidths()))
legend_handle.set_linestyle(get_first(orig_handle.get_linestyles()))
legend_handle.set_transform(get_first(orig_handle.get_transforms()))
- legend_handle.set_figure(orig_handle.get_figure())
# Alpha is already taken into account by the color attributes.
def create_artists(self, legend, orig_handle,
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index 43b0c1891a27..159fc70282b8 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -3293,6 +3293,20 @@ def test_stackplot_hatching(fig_ref, fig_test):
ax_ref.set_ylim((0, 70))
+def test_stackplot_subfig_legend():
+ # Smoke test for https://github.com/matplotlib/matplotlib/issues/30158
+
+ fig = plt.figure()
+ subfigs = fig.subfigures(nrows=1, ncols=2)
+
+ for _fig in subfigs:
+ ax = _fig.subplots(nrows=1, ncols=1)
+ ax.stackplot([3, 4], [[1, 2]], labels=['a'])
+
+ fig.legend()
+ fig.draw_without_rendering()
+
+
def _bxp_test_helper(
stats_kwargs={}, transform_stats=lambda s: s, bxp_kwargs={}):
np.random.seed(937)
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